[1]孟祥海,李玉梅,王根林,等.不同耕作方式对草甸土结构变化的影响[J].黑龙江农业科学,2019,(07):4-11.[doi:10.11942/j.issn1002-2767.2019.07.0004]
　MENG Xiang-hai,LI Yu-mei,WANG Gen-lin,et al.Effects of Different Farming Methods on the Soil Structure of Meadow Soil[J].HEILONGJIANG AGRICULTURAL SCIENCES,2019,(07):4-11.[doi:10.11942/j.issn1002-2767.2019.07.0004]
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不同耕作方式对草甸土结构变化的影响

《黑龙江农业科学》[ISSN:1002-2767/CN:23-1204/S] 卷: 期数: 2019年07期 页码: 4-11 栏目: 出版日期: 2019-07-10
Title:
Effects of Different Farming Methods on the Soil Structure of Meadow Soil
作者:
孟祥海1; 李玉梅2; 王根林3; 王立柱1; 邵广忠1; 胡颖慧1; 孙殷会1; 张庆娜1
1.黑龙江省农业科学院 牡丹江分院，黑龙江 牡丹江 157000；2.黑龙江省农业科学院 土壤肥料与环境资源研究所，黑龙江 哈尔滨 150086; 3.黑龙江省农业科学院 畜牧研究所，黑龙江 哈尔滨 150086
Author(s):
MENG Xiang-hai1; LI Yu-mei2; WANG Gen-lin3; WANG Li-zhu1; SHAO Guang-zhong1; HU Ying-hui1; SUN Yin-hui1; ZHANG Qing-na1
1.Mudanjiang Branch,Heilongjiang Academy of Agricultural Sciences,Mudanjiang 157000,China; 2.Institute of Soil Fertilizer and Environmental Resources,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China; 3.Institute of Animal Husbandry,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China
关键词:
草甸土; 耕作方式; 土壤结构
Keywords:
meadow; soil structure; tillage; straw return
DOI:
10.11942/j.issn1002-2767.2019.07.0004
文献标志码:
A
摘要:
为促进土壤结构改良，通过田间定位试验，从时间和空间尺度上，研究不同耕作与秸秆还田方式对典型旱地草甸土土壤团聚体和土壤容重的季节动态变化的影响。结果表明：不同耕作与培肥方式下，土壤容重均在20~30 cm土层较高，平均1.51 g·cm-3；不同耕作方式，0~40 cm土层拔节期前 NT＜DT＜ST；大喇叭口期至成熟期，NT容重增加；成熟期0~30 cm土层，深翻（1.45 g·cm-3)与浅翻(1.44 g·cm-3)无差异，30~50 cm土层，深翻容重(1.48 g·cm-3)略有增加；免耕秸秆覆盖，0~50 cm土层平均容重(1.42 g·cm-3)，比DT-S和ST-S减少0.03~0.05 g·cm-3；0~30 cm土层，ST-S比＞DT-S增加0.05 g·cm-3，30~50 cm土层，趋势相反。浅翻会造成犁底层上移，0~30 cm容重增加，而深翻增加了40~50 cm土层容重。10~20 cm质地为粉砂质粘土，40~50 cm为粘土，其余土层为壤质粘土；免耕与耕作前土壤团聚体分布更接近，均在>1 mm粒级处出现高峰，而ST与DT处理的波动性变化比较接近，NT处理在40~50 cm土层的0.5~1.0和3.0~5.0 mm粒径土粒含量明显高于ST与DT处理。横向比较，不同耕作方式下，团聚体分布不同；纵向比较，同一耕作方式，无论秸秆还田与否，不同粒级团聚体的波动性变化趋势一致。综合可知，土壤团聚体的机械稳定性受耕作方式影响较大，短期耕作与秸秆还田方式对土壤理化性状的影响虽受年季间的影响发生变化。
Abstract:
In order to promote soil structure improvement,the effects of different tillage and straw mulching methods on the seasonal dynamic changes of soil aggregates and soil bulk density in typical upland meadow soils were studied through field location experiments on time and space scales.The results showed that under different tillage and fertilizer cultivation methods,the bulk density of soil was higher in the soil layer of 20-30 cm,with an average of 1.51 g·cm-3.Different tillage methods,0-40 cm soil layer NT
DT-S,and the trend was opposite in the 30-50 cm soil layer.Shallow turning will cause the bottom layer of plough to move upward,and the bulk density of 0-30 cm will increase,while deep turning will increase the bulk density of 40-50 cm soil layer.The texture of 10-20 cm was silty clay,40-50 cm was clay,and the remaining soil layer was loamy clay.The distribution of soil aggregates was closer to that of soil aggregates before no-tillage and tillage,and they all peaked at>and 1 mm grain size,while the fluctuation of ST and DT treatment was close,and the content of soil particles with particle size of 0.5-1.0 and 3.0-5.0 mm in the soil layer with NT treatment was significantly higher than that of ST and DT treatment.The distribution of aggregates was different under different tillage methods.Longitudinal comparison showed that the variation trend of aggregates with different grain size was consistent with the same tillage method,no matter whether straw was returned to the field or not.It can be concluded that the mechanical stability of soil aggregates is greatly affected by tillage methods.Although the influences of short-term tillage and straw mulching on soil physical and chemical properties change from year to season,they provide scientific basis for the comprehensive supporting measures such as tillage and fertilizer cultivation in agricultural production.
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备注/Memo

收稿日期：2019-04-01

基金项目：国家粮食丰产增效项目（2016YFD0300806）；黑龙江省重点基金（ZD2016008）；黑龙江省级资助项目（GX18B013）。
第一作者简介：孟祥海（1985-），男，硕士，研究实习员，从事土壤肥料与秸秆资源利用研究。E-mail:mengxianghai538@163.com。
通讯作者：李玉梅（1971-），女，博士，研究员，从事土壤与肥料研究。E-mail:liyumeiwxyl@126.com。

更新日期/Last Update: 2019-07-09